Echelon : পর্যায়; স্তর; ব্যূহ;
Related Words
echelon  echelons  excellent  excelling  See Words Also In
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Appropriate Prepositions
Bar to(বাধা): Poverty is not a bar to happiness.
Dedicate to (উৎসর্গ করা): His pfe is dedicated to the welfare of the country.
Despair of (নিরাশ হওয়া): Do not despair of further improvement.
Indifferent to (উদাসীন): Everybody is indifferent to my problem.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Out of order (বিকল): The elevator was out of order.
To the utmost (যথাসাধ্য) - I tried to the utmost of my ability to have a job.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.